Resize ScrollView when needed

Occasionally Titanium's ScrollView needs to be reminded that it should
have a height of Ti.UI.SIZE, particularly when new views are added to a
child of the ScrollView that change its height. This commit will handle
the case where this happens within a CollectionView.

src/tb/views/collection.coffee

@@ -12,3 +12,21 @@ module.exports = class CollectionView extends Chaplin.CollectionView
 
   delegateNewEvents: (events) ->
     @_delegateEvents events
+
+  # If the collection view is within a ScrollView then the ScrollView needs to
+  # have its height reset after items are added. If there isn't a ScrollView
+  # then this will be a noop.
+  resizeScrollView: ->
+
+    @findScrollView ?= _.once =>
+      @_scrollView = @$list.parents 'ScrollView'
+
+    @findScrollView().attr height: Ti.UI.SIZE
+
+  itemAdded: ->
+    super
+    @resizeScrollView()
+
+  itemsResetted: ->
+    super
+    @resizeScrollView()

test/helpers/index.coffee

@@ -3,11 +3,16 @@ _ = require 'underscore'
 
 app.stitchRequire('tb').load()
 
+# Allows sinon.js to work without modification
+document.createElement = ->
+
 module.exports =
 
   Backbone: app.Backbone
 
   chai: require 'chai'
 
+  sinon: require 'sinon'
+
   require: (path) ->
     app.stitchRequire path

test/tb/views/collection_test.coffee

@@ -1,6 +1,7 @@
 helpers = require '../../helpers'
 
 { assert } = helpers.chai
+sinon = helpers.sinon
 
 _ = require 'underscore'
 
@@ -43,6 +44,44 @@ describe 'Collection view', ->
 
     assert.equal table.$el.find('TableViewRow').length, 2
 
-    # assert.equal (new ViewWithoutAutoRender).$el.find('Label').length, 0
+  it 'should resize a ScrollView if present when adding items', ->
 
-    # assert.equal (new ViewWithAutoRender).$el.find('Label').length, 1
+    class Row extends Chaplin.View
+
+      tagName: 'TableViewRow'
+
+      className: -> @model.get 'name'
+
+      render: ->
+        @$el.html '<Label>'
+        @
+
+    class Table extends CollectionView
+
+      tagName: 'TableView'
+
+      autoRender: true
+
+      itemView: Row
+
+    class ScrollView extends Chaplin.View
+
+      tagName: 'ScrollView'
+
+    collection = new Backbone.Collection()
+
+    table = new Table { collection }
+
+    scrollView = new ScrollView
+
+    spy = sinon.spy();
+
+    scrollView.$el.append table.el
+
+    scrollView.el.applyProperties = spy
+
+    collection.add
+      id: _.uniqueId 'row'
+      name: 'test-3'
+
+    assert spy.called